Set attainable goals that get you to a place of exercising faith in yourself.
Simply put, reaching goals builds confidence. Without a reason to believe in yourself you can be easily shaken. A faith built blindly is no faith at all. Yes there are times when you must make a leap of faith, but those leaps are best taken when you can believe in yourself to handle whatever comes of them. And that faith in self is best built consciously, one decision at a time and with patient fortitude.
The first goals should be something you already love doing that stretches your experience just a bit. For example if you love to exercise, determine to increase your stamina or strength by a specific measurable amount in a reasonable time. Likely you have done this time and again if you’re an exercise fan. If you love to read, pick a book that you really want to know more about and determine to write a short synopsis of each chapter to increase your depth of comprehension (it can be a paragraph or a page). Begin your goal setting with things you already are passionate about.
Once you have measurably expanded your faith in doing things you love to a greater degree, then move on to responsibilities that you don’t enjoy but know you must take care of. Pick one. It is important to NOT overload yourself with optimism and then let yourself down. So, let’s say you hate doing dishes and they tend to pile up for a couple of days. Determine to wash each dish as you use it as much as possible, and when that is not possible (say you are cooking for a large group or a complex recipe) determine that you will have all dishes washed before bed each night for one month. At the end of the month you may return to old habits; that is not failure that is a true expression of your feelings. If you set the goal to do it for a month and you did that is a success.
Now that you have done two or three things that increased your faith in yourself as a responsible person expand into things that are totally new to you. Everybody has curiosities, things they are interested in learning more about but haven’t yet explored them. Take a few days to make a list of those things. When you are ready for your next level of self faith pick one. Take the time to learn more about this interest and to determine just how much you want to know about it. If you want to know everything about it, then break the learning down to what you can reasonably learn in a month, or a semester and commit yourself to that learning. Do not commit to the entire thing if it is huge, but to each step of learning. Always give yourself permission to be flexible and/or to change your mind.
Along the way, you will likely have times where you don’t fulfill your commitment to yourself. This is where self-forgiveness is absolutely important, without self-forgiveness you will cease all growth and the goal here is growth.
Once you have taken a few steps into learning something new and have fulfilled your commitment to yourself it may be time to consider that leap of faith. Not because you know it will work out, but because you know you will do what is right and you will have even more faith in yourself.
Growing self-confidence is a never-ending process. Make sure you keep people around you who can help you to remember your successes, who choose to celebrate you. Every step of your journey will be easier with those people around.